How to handle IndentationError: unindent does not match any outer indentation level

Question

I've search everywhere and I can't find the answer anywhere, I'va had trouble with my code, I'm trying to do a simple inventory with peewee. All I'm having is this error.

  File "inventario.py", line 38
if selection =='1':
                  ^
IndentationError: unindent does not match any outer indentation level

I've read that tabs mixed with spaces can make this happen, already checked that, even used the tool SublimeText has to replace tabs with spaces.

from peewee import *

db = SqliteDatabase('stockpy.db') #creates db

class Product(Model): #data to create product table
    id_prod = IntegerField()
    name = CharField()
    price = IntegerField()
    stock = IntegerField()

    class Meta:
        database = db #tells which db to use 

Product.create_table() #creates table

def newProd(id_prod, name, price, stock):
     Product.create(id_prod =  id_prod, name = name, price = price, stock = stock) #adds new product with input

def deleteProd(name): #Deletes de product with the given name
     todelete = Product.get(Product.name == name)
     todelete.delete_instance()
def viewStock():
     for name in Product.select(): #shows whats in the table
      print Product.id_prod, Product.name, Product.price, Product.stock

menu = {} #simple menu
menu['1']="Add product." 
menu['2']="Delete product."
menu['3']="View stock"
menu['4']="Exit"
while True: 
  options=menu.keys()
  options.sort()
  for entry in options: 
        print entry, menu[entry]
        selection=raw_input("Please Select:")
   if selection =='1':
        print "Need the following data:"
        id_prod = raw_input("Product id: ")
        int(id_prod)
        name = raw_input("Product name: ")
        price = raw_input("Product price: ")
        int(price)
        stock = raw_input ("How many are there: ")
        int(stock)
        print "You're adding the following data", id_prod, name, price, stock
      newProd()
   elif selection == '2':
        name = raw_input ("Enter the name of the product you want to delete: ")
       deleteProd(name)
   elif selection == '3':
        print "Here's your stock"
        viewStock()
   elif selection == '4':
         print "Goodbye"
         break
   else:
         print "Unknown Option Selected!"

Any help or hint would be greatly appreciated. Thanks in advance.

Answer 1

Your indentation needs to be consistent. Pick an indentation size (4 spaces recommended) and stick with it. Each line should be indented at some multiple of this indentation size.

I've commented your code with the number of spaces preceding each line (note the inconsistencies):

menu = {} #simple menu                             # 0
menu['1']="Add product."                           # 0
menu['2']="Delete product."                        # 0
menu['3']="View stock"                             # 0
menu['4']="Exit"                                   # 0
while True:                                        # 0
  options=menu.keys()                              # 2
  options.sort()                                   # 2
  for entry in options:                            # 2
        print entry, menu[entry]                   # 8
        selection=raw_input("Please Select:")      # 8
   if selection =='1':                             # 3
        print "Need the following data:"           # 8
        id_prod = raw_input("Product id: ")        # 8
        int(id_prod)                               # 8
        name = raw_input("Product name: ")         # 8
        price = raw_input("Product price: ")       # 8
        int(price)                                 # 8
        stock = raw_input ("How many are there: ") # 8
        int(stock)                                 # 8
        print "You're adding the following data", id_prod, name, price, stock # 8
      newProd()                                    # 6
   elif selection == '2':                          # 3
        name = raw_input ("Enter the name of the product you want to delete: ") # 8
       deleteProd(name)                            # 7
   elif selection == '3':                          # 3
        print "Here's your stock"                  # 8
        viewStock()                                # 8
   elif selection == '4':                          # 3
         print "Goodbye"                           # 9
         break                                     # 9
   else:                                           # 3
         print "Unknown Option Selected!"          # 9

Answer 2

I guess this is what you want:

from peewee import *

db = SqliteDatabase('stockpy.db') #creates db

class Product(Model): #data to create product table
    id_prod = IntegerField()
    name = CharField()
    price = IntegerField()
    stock = IntegerField()
    class Meta:
        database = db #tells which db to use 

Product.create_table() #creates table

def newProd(id_prod, name, price, stock):
     Product.create(id_prod=id_prod,
                    name=name,
                    price=price,
                    stock=stock) #adds new product with input

def deleteProd(name): #Deletes de product with the given name
     todelete = Product.get(Product.name == name)
     todelete.delete_instance()

def viewStock():
    for name in Product.select(): #shows whats in the table
        print Product.id_prod, Product.name, Product.price, Product.stock

menu = {} #simple menu
menu['1'] = "Add product." 
menu['2'] = "Delete product."
menu['3'] = "View stock"
menu['4'] = "Exit"
while True: 
    options = menu.keys()
    options.sort()
    for entry in options: 
        print entry, menu[entry]
        selection=raw_input("Please Select:")
    if selection =='1':
        print "Need the following data:"
        id_prod = raw_input("Product id: ")
        int(id_prod)
        name = raw_input("Product name: ")
        price = raw_input("Product price: ")
        int(price)
        stock = raw_input ("How many are there: ")
        int(stock)
        print "You're adding the following data", id_prod, name, price, stock
        newProd()
    elif selection == '2':
        name = raw_input ("Enter the name of the product you want to delete: ")
        deleteProd(name)
    elif selection == '3':
        print "Here's your stock"
        viewStock()
    elif selection == '4':
        print "Goodbye"
        break
    else:
        print "Unknown Option Selected!"

I had to guess at some of the indentation because it was unclear to me which things were part of which blocks.

You need to get an editor that handles indentation properly. For best results, always indent using four spaces per level of indentation.